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30岁小伙发明自动焊接装置，焊接平整效率高，十年师傅自愧不如
这个30岁的小伙发明了一个自动焊接装置，不仅构造简单，而且焊接平整，效率提高还节省人工，十几年的师傅都自愧不如，感觉真的要被淘汰了！
厉害了，网红小伙100个发明创意制作，学会了能发家致富59/92
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